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Finding the Fourth Proportional to 1,165.10, 1,607.31 and 745.38

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Solution

The fourth proportional to 1,165.10, 1,607.31 and 745.38 is: 1,028.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,165.10 : 1,607.31 = 745.38 : x
  2. Step 2: Convert to fraction form
    1,165.10/1,607.31 = 745.38/x
  3. Step 3: Cross multiply
    1,165.10x = 1,607.31 × 745.38
  4. Step 4: Simplify right side
    1,165.10x = 1,198,056.73
  5. Step 5: Solve for x
    x = 1,198,056.73/1,165.10
  6. Step 6: Final answer
    x = 1,028.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.